{"id":"F2006B08397","name":"AD/CESSNA 500/22 - Brake Shuttle Valve","slug":"ad-cessna-500-22-brake-shuttle-valve","collection":"legislative_instrument","jurisdiction":"commonwealth","status":"repealed","isInForce":false,"actNumber":null,"makingDate":null,"administeringDepartment":null,"currentVersion":{"id":115842,"registerId":"commonwealth-F2006B08397-current","compilationNumber":null,"startDate":"2026-04-03","status":"Repealed","reasons":null,"registeredAt":null},"sections":[{"sectionNumber":"1","sectionType":"section","heading":"AD/CESSNA 500/22 - Brake Shuttle Valve","content":"COMMONWEALTH OF AUSTRALIA (Civil Aviation Regulations 1998), PART 39 \\- 105 CIVIL AVIATION SAFETY AUTHORITY\n\nSCHEDULE OF AIRWORTHINESS DIRECTIVES\n\n![](image.001.png)  \nCessna 500 (Citation) Series Aeroplanes\n\nAD/CESSNA 500/22 Brake Shuttle Valve 5/90\n\nApplicability: Model 500 and 501 with unit numbers \\-0001 through \\-0689 incorporating SB 32-38, BF Goodrich brakes and wheels installation.\n\nRequirement: 1. Inspect in accordance with Cessna Alert Service Letter SLA 500-32-46.\n\n2. Replace brake shuttle valves in accordance with BF Goodrich Service Bulletin SB 517.\n\nCompliance: 1. Within 50 hours time in service after 17 May 1990 and thereafter at intervals not to exceed 50 hours time in service, until BF Goodrich SB 517 is incorporated.\n\n2. Within 200 hours time in service after 17 May 1990.\n\nBackground: Reports of leaking shuttle valves have been received by the manufacturer. Leakage has been attributed to slow deterioration of shuttle valve o-ring material as a result of exposure to an incompatible seal lubricant.","sortOrder":0}],"analysis":{"kimi_summary":{"_metrics":{"model":"kimi-k2.5","source":"moonshot-batch","completionTokens":2833},"content_quality":"ok","complexity_score":2,"scope_assessment":{"changed":false,"description":"The directive maintains a narrow, targeted scope addressing a specific mechanical defect (leaking brake shuttle valves) in a defined subset of Cessna 500/501 aircraft. It has not expanded beyond its original safety-critical purpose."},"complexity_factors":["Technical aviation terminology (e.g., 'time in service', 'brake shuttle valve', 'Service Bulletin')","Cross-references to external technical documents (Cessna Alert Service Letter SLA 500-32-46 and BF Goodrich SB 517)","Precise applicability criteria requiring verification of aircraft serial numbers and specific equipment configurations"],"plain_english_summary":"This airworthiness directive requires owners/operators of Cessna 500 and 501 Citation jets (serials -0001 through -0689) fitted with BF Goodrich brakes/wheels as modified by Service Bulletin 32‑38 to inspect and ultimately replace brake shuttle valves.  \n\nInspections must be repeated until the permanent valve replacement is installed to prevent seal lubricant degradation of O‑rings, which can cause brake leaks and risk brake failure during taxi or landing."}},"importantCases":[],"_links":{"self":"/api/acts/ad-cessna-500-22-brake-shuttle-valve","history":"/api/acts/ad-cessna-500-22-brake-shuttle-valve/history","analysis":"/api/acts/ad-cessna-500-22-brake-shuttle-valve/analysis","conflicts":"/api/acts/ad-cessna-500-22-brake-shuttle-valve/conflicts","importantCases":"/api/acts/ad-cessna-500-22-brake-shuttle-valve/important-cases","documents":"/api/acts/ad-cessna-500-22-brake-shuttle-valve/documents"}}